Acceleration sensor

Details Acceleration sensor Acceleration sensor

1991-07-25

1992-11-17

Scott, J. R.

Electricity: circuit makers and breakers

Special application

Change of inclination or of rate of motion responsive

200 6153, H01H 3514

Patent

active

051645564

ABSTRACT:
An acceleration sensor comprising a cylinder of a conductive material, a magnetized inertial member mounted in the cylinder so as to be movable longitudinally of the cylinder, a conductive member mounted at least on an end surface of the inertial member that is on a side of one longitudinal end of the cylinder, a pair of electrodes disposed at this one longitudinal end of the cylinder, and an attracting member disposed on a supporting device near the other longitudinal end of the cylinder. When the conductive member of the inertial member comes into contact with the electrodes, these electrodes are caused to conduct via the conductive member. The attracting member is made of a magnetic material such that the attracting member and the inertial member are magnetically attracted toward each other. The magnetized inertial member comprises a core including a cylindrical permanent magnet, a hard plating layer formed on the curved surface of the core, and a conductive plating layer formed at an end surface of the core that is located on a side of the electrodes. Another magnetized inertial member comprises a cylindrical core including a permanent magnet, a synthetic resin layer enclosing the curved surface of the core, and a conductive plating layer formed on the end surface of the core that is located on the side of the electrodes.

REFERENCES:
patent: 2932703 (1960-04-01), Haberland
patent: 3132220 (1964-05-01), Uri et al.
patent: 3171913 (1965-03-01), Kersh
patent: 4128823 (1978-12-01), Tanaka et al.
patent: 4827091 (1989-05-01), Behr
patent: 4873401 (1989-10-01), Ireland

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